Oxidation and reduction
Oxygen in redox Oxidation is the gain of oxygen. Reduction is the...
GCE O-level Chemistry
Acids, Bases and Salts
Acids An acid is a compound which when dissolved in water produces...
Equilibria
Reversible Reactions is a reaction in which reactants form products and the...
Ammonia
Ammonia is a poisonous, colourless gas with a pungent smell. Mainly manufactured...
sulphuric acid
Sulfur Sources sulfur By-product of petroleum and natural gas refining Occurs in...
The Periodic Table
The Periodic table is a method of classifying elements. Elements are arranged...
Stoichiometry
Valences of each elemental group Group Valency I 1 II 2 III...
Chemical energetics
Exothermic reactions reactions which gives out energy the surroundings gain energy bonds...
Pollution
Main pollutants Carbon monoxides from unburnt hydrocarbons, exhaust fumes sulphur dioxide from...